Alloy Grade UNS: HPNbMA – Micro-Alloyed

  • Overview

    25-35MA is a micro-alloy with small additions of reactive and rare earth elements that is especially stable at higher temperatures, and reduces carburization and surface oxidation. The service limit is 2100 degrees Fahrenheit (1150 degrees Celsius). It's also referred as HPNbMA.

  • Typical Uses

    Petrochemical furnaces.

  • MetalTek Grade

    MTEK 25-35MA

Similar Specifications

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.35-0.55

Chromium: 23-27

Manganese: 1.5

Iron: BAL

Copper: n/a

Nickel: 33-37

Lead: n/a

Tin: n/a

Silicon: 2

Zinc: n/a

Other: Mo 0.50 MAX; Nb 0.50-1.25

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated

NOTES: Elongation % for static/sand is 6